LCD is dead after an SSD upgrade.

After installing an new SSD (which replaced my old hard drive) into my iMac I reconnected the screen and hit the power button. The screen did not turn on, but the computer did. since then I've formatted the SSD and installed mavericks and migrated my old files over. I've been using my TV as a temporary monitor through all this.

These are the things I've tried to get my screen running again:

I've replaced:

the LCD back-light cable

the LCD data cable

the LCD back-light sync

I reset the pram and smc

I shined a flashlight on the screen to see if the backlight wasn't working (this is after replacing the cable) - There was nothing on the screen.

-

The only thing that I see periodically on the screen is what I think to be an apple logo that flashes on startup.

Besides that the screen has been completely dead, no light, no pixels, nothing.

The iMac was lying on it's back with the glass off when I tried all these things.

I'm at my wits end, I have no idea what to do and why the LCD is not functioning. Please, if anyone has any clue why this is or what else I can try I would greatly appreciated the help. Thank you.